Question

For given constant temperature and pressure, the number of molecules per unit volume of a gas ....... .
(A) is different for different gases
(B) varies with the volume of molecules of the gas
(C) is proportional to the molecular mass of the gas
(D) same for all gases

Answer 1

same for all gases(D)

Explanation:

at constant temperature and pressure no change in volume

Answer 2

Answer:

(D) same for all gases

Explanation:

The number of molecules per unit volume of a gas same for all gases, For given constant temperature and pressure.

As we know that there is no change in volume of the gas at the constant pressure and temperature.

we know that the ideal gas equation is

PV= nRT

where, P is the pressure

V is the volume and

T is the temperature